I went from a X200 to work on my hobby OS 5 years ago, to a T440p with 16 GB of RAM for my daily computing, then upgraded to a T480 that I could fit with 64GB of RAM, and I finally added a X270 for a more compact form when I'm outside.

They were all very inexpensive due to their age (when RAM was still cheap) and I'm really happy about them, I work from a console and a browser, they are perfect for my usage. I wouldn't use any other kind of laptop.